Why didn't Mr. Popo take down Daimao?

[Gaffer Tape]

Freeza and Dodoria had never seen such a type of attack and moreover Kuririn can send a barrage of discs at his target.

And yet Freeza was STILL able to detect it and avoid it, even though it came from behind!

[Kid Buu]

Freeza had never seen such an attack? Didn't he defeat himself with it?

[Puto]

Vegeta was on guard and prepared as he had anticipated that other 2 may join in.

And someone who just got blinded WOULDN'T be on-guard? I mean, come on, if you just got blinded, the logical thing to expect is that somebody would attack you!

Freeza and Dodoria had never seen such a type of attack

This is possible in Dodoria's case, but Freeza most definitely had, considering he himself uses a homing variation of it.

[Cure Dragon 255]

I think its because the world could not lose the Dragon Balls before everyone killed by Piccolo Daimaoh had returned to life...

[Gaffer Tape]

But the world had already lost the Dragon Balls. And God said he had considered not reviving Shen Long until Goku showed up and convinced him otherwise.

[Cure Dragon 255]

You are right. I WAS going to say they lost them halfway through the saga but yes, you are right.